Macroscopic chemo-mechanical modeling of alkali-silica reaction of concrete under stresses

Creep plays an important role for deformation of ASR-affected structures which are subjected to various stresses or restraint. It still remains controversial, however, how the combination of creep and stress states or restraints affects expansion. In this study, creep was taken into account as a “prescribed” strain computed at previous timestep and the model was implemented in a chemo-mechanical calculation. The calculation was validated with previous experiments in which the expansive behavior of concrete subjected to stresses had been monitored under different applied stresses and restraint conditions. The results showed that the calculations gave consistent results with the experiments, supporting the validity of the model and the importance of taking creep into account.